Q. Instrument for measuring blueness of the sky or ocean is called ___________.
A) Ceraunograph
B) Bathymeter
C) Barometer
D) Cyanometer
โ Correct Answer: Cyanometer
Exam Insight
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A) Ceraunograph
B) Bathymeter
C) Barometer
D) Cyanometer
โ Correct Answer: Cyanometer
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